My search for where to read 'To My Dear Historia' online basically turned into its own little saga. I got hooked by fan discussions and really wanted to get into it. The full experience is split between Shosetsuka ni Naro, the Japanese web novel site where the original serialization began, and Kakuyomu, which is another big platform for web novels over there. The problem, if you don't read Japanese, is obvious. For English, you're largely at the mercy of fan translation efforts. These can be amazing, but they're scattered across various blogs, Discord servers, and aggregate sites. I stumbled on a pretty consistent translation project by just searching the exact title plus 'translation chapter 1' and finding a blog that had up to chapter 40 or so. The updates were sporadic, though.
A lot of people recommend checking NovelUpdates as a hub; it often lists the known fan translation sources and their status. It's a good starting point to see which group is currently working on it and where they post. Just a heads-up: the translation quality can vary a lot from one project to another, and some of those aggregate sites are riddled with pop-up ads. Finding a direct link to a translator's own site or a well-moderated Discord is the real win. Honestly, half the journey with these niche serials is just tracking down a readable version.
The story itself is a fascinating blend of historical fiction with a romantic core, so I found the hunt was worth it for the unique premise. Just be prepared for a bit of digital archaeology.